Protective Effects and Mechanisms of MicroRNA-182 on Oxidative Stress in RHiN

To explore protective effects and related mechanisms of microRNA-182 (miR-182) on oxidative stress in rat hippocampal neurons (RHiN), RHiN cells. As the results, the survival rate and superoxide dismutase levels in H(2)O(2) group were significantly lower than H(2)O(2)+miR-182 group (all P<0.05). The malondialdehyde levels and apoptosis rate in H(2)O(2)+miR-182 group were significantly lower than H2O2 group (all P<0.05). The mRNA levels and expression levels of mTOR and PI3K in H(2)O(2)+miR-182 group were higher than those in H(2)O(2) group (both P<0.05). The experiment of cerebral ischemic oxidative stress model rats showed that the survival rate, apoptosis rate, malondialdehyde and superoxide dismutase levels in miR-182 group were better than model control group. The positive staining intensity of phosphoinositide 3-kinase (mTOR) and phosphoinositide 3-kinase (PI3K) in model control group were significantly lower than miR-182 group (all P<0.05). Increased levels of miR-182 can reduce the damage of H2O2 treatments in RHiN cells. Oxidative stress is decreased in the neuronal cells possibly by activation of the PI3K-AKT-mTOR pathway.